London terror attacker PICTURED: Dramatic first pictures of man taken into custody

THIS is the moment armed policemen surround a man believed to be involved in the Parliament terror attack.

London terror attack: An armed policeman points a gun at a man on the ground

A policeman has died after he was stabbed and his attacker shot by officers after a major terrorist incident at the Houses of Parliament, which has killed at least five people, including the suspected attacker.

The attacker mowed down several pedestrians as he drove a grey Hyundai i40 across Westminster Bridge before crashing it into railings then running through the gates of the Palace of Westminster and stabbing the officer.

Eyewitnesses said he was shot by police as he approached a second officer clutching his knife.

Scotland Yard said five people have died including a policeman and the suspected attacker shot by a police firearms officer. At least 40 people have been injured.

Eyewitnesses described scenes of terror as the attacker was shot several times as he approached a second officer within yards of the Houses of Parliament.

Paramedics fought to save his life and that of his victim on the floor of the cobbled courtyard in front of Parliament with Foreign Office minister Tobias Ellwood among those who rushed to help.

Colleen Anderson, a junior doctor at St Thomas' hospital, said a woman was killed as the attacker drove a grey Hyundai i40 across Westminster Bridge before crashing it into railings then running through the gates of the Palace of Westminster.